Windows 7 Internet Drops Out Randomly: Fix

Several users have reported an issue in which Windows 7 Internet (network) connections die or drop out randomly during routine use. This can cause Web browsers to suddenly stop loading pages; network drives to disappear; and other network-enabled applications to lose functionality. The problem may be especially prominent with the Atheros L1 Gigabit Ethernet 10/100/1000Base-T [...]

No Internet After Vista SP2 Upgrade; Gateway Missing; Fix

Several users have reported an issue in which the computer’s gateway is missing after the update to Windows Vista SP2. This issue generally results in an inability to connect to the Internet, although connections to LANs may still work.
Fix
The solution for this problem, as discovered by Ilja Herlein of the NetSetMan forums, is as [...]

Latest Broadcom Drivers Fix Windows 7 WiFi Problems

Several users have reported a problem in which Windows 7 RC1 systems either cannot connect to wireless networks or display the message low connectivity or no connection when attempted to the network. In some cases, using Windows 7’s built-in “fix” routine can resolve the issue, albeit temporarily.
Fix
Updating to the latest set of Broadcom wireless drivers, [...]

Wireless Suddenly Stops Working in Windows Vista: Fixes

Several users have reported an issue in which wireless connectivity (WiFi) suddenly stops working in Windows Vista. There are a variety of causes for this problem, but two primary fixes.
Fixes
Make sure wireless service is started First, make sure the wireless service is started.

Click the Start button then type services.msc in the search box and [...]

Web Browsers Cannot Connect to Internet: Fixes

Several users have reported an issue in which various Web browsers (Internet Explorer, Firefox, Google Chrome) cannot connect to websites despite the presence of an otherwise valid, working Internet connection.
Many users find that, when this problem occurs, they can ping the network, access email and perform other network functions, but browsers are dead in [...]

“Windows Cannot Connect to the Printer”: Fix

Several users have reported an issue in which Windows displays the message “Windows cannot connect to the printer. Access is denied” when attempting to add a new printer through the printer wizard, or suddenly after a system update or restart.
Fix
This issue can sometimes be fixed via the following process:

Open the control panel and [...]

Antivirus Software Conflicts Can Cause Internet Problems

As we have noted, the presence of two overlapping antivirus or antimalware/spyware/firewall tools can cause various conflicts. Users should install one (and only one) strong anti-virus package and make sure it’s up-to-date.
One problem that can result from the presence of conflicting protection tools is an inability to connect to the Internet. This issue is [...]

Internet Explorer, Other Microsft Apps Cannot Connect to Internet: Fix

Some users have noticed an issue in which various Microsoft applications, including Internet Explorer, Windows Update and others, suddenly can no longer connect to the Internet. Internet Explorer may display “cannot display this web page” when the problem occurs. This issue is sometimes caused by problematic policy files spawned by third-party programs.
It can generally be [...]